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Yamaguchi T, Aihara A, Mashiko S, Kurosawa E, Oizumi T, Yamagata T, Ishiki A, Ueda J, Fujikawa Y, Kanno A, Sumitomo K, Ohara T, Furukawa K. Exacerbation of delirium and epileptic seizures in an older man with idiopathic Parkinson's disease due to multiple prescriptions: a case report. Front Med (Lausanne) 2024; 11:1415988. [PMID: 39091287 PMCID: PMC11291346 DOI: 10.3389/fmed.2024.1415988] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2024] [Accepted: 06/03/2024] [Indexed: 08/04/2024] Open
Abstract
Introduction Parkinson's disease (PD) is a disorder characterized by motor symptoms, such as rigidity, akinesia, and resting tremor, as well as non-motor symptoms, including psychiatric manifestations and autonomic failure. The prevalence of PD increases with age, and the condition is more common in men than in women. Conversely, polypharmacy has emerged as a paramount medical concern, especially among older patients, correlating with medicines' adverse effects, interactions between medicines, frequent admissions to the hospital, and a high risk of morbidity and mortality. Case description We encountered an older male patient with idiopathic PD and mild renal dysfunction. Originally prescribed 14 types of medicines, including anti-PD drugs, the patient developed delirium and epileptic seizures during hospitalization. After reducing the number of medications, including amantadine, the symptoms significantly improved. This clinical course suggests that polypharmacy, in addition to PD itself, poses a significant risk of delirium and epileptic seizures, even in patients with mild renal dysfunction. Conclusion This report is indicative of the risk of polypharmacy and highlights the importance of citing drug interactions for a correct diagnosis in patients presenting with complex symptoms.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | - Katsutoshi Furukawa
- Division of Geriatric and Community Medicine, Faculty of Medicine, Tohoku Medical and Pharmaceutical University, Sendai, Japan
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2
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D'Amelio M, Costa C. Clarifying the role of D1 receptor signalling in Alzheimer's-related epilepsy commentary on Szabo et al. (2024). Eur J Neurosci 2024; 59:2549-2551. [PMID: 38648886 DOI: 10.1111/ejn.16359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2024] [Revised: 04/01/2024] [Accepted: 04/03/2024] [Indexed: 04/25/2024]
Affiliation(s)
- Marcello D'Amelio
- Unit of Molecular Neurosciences, Department of Medicine and Surgery, Università Campus Bio-Medico di Roma, Rome, Italy
- Department of Experimental Neurosciences, IRCCS Santa Lucia Foundation, Rome, Italy
| | - Cinzia Costa
- Section of Neurology, S.M. della Misericordia Hospital, Department of Medicine and Surgery, University of Perugia, Perugia, Italy
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3
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Ahmadi M, Rouhi N, Fathollahi Y, Shojaei A, Rezaei M, Rostami S, Saab BJ, Mirnajafi-Zadeh J. A Dual Effect of Dopamine on Hippocampal LTP and Cognitive Functions in Control and Kindled Mice. J Neurosci 2024; 44:e0926212023. [PMID: 38124004 PMCID: PMC10860576 DOI: 10.1523/jneurosci.0926-21.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2021] [Revised: 11/02/2023] [Accepted: 12/12/2023] [Indexed: 12/23/2023] Open
Abstract
The impact of dopamine on synaptic plasticity and cognitive function following seizure is not well understood. Here, using optogenetics in the freely behaving animal, we examined exploratory behavior and short-term memory in control and kindled male mice during tonic stimulation of dopaminergic neurons within the ventral tegmental area (VTA). Furthermore, using field potential recording, we compared the effect of dopamine on synaptic plasticity in stratum radiatum and stratum oriens layers of both ventral and dorsal hippocampal CA1 regions, and again in both control and kindled male mice. Our results demonstrate that tonic stimulation of VTA dopaminergic neurons enhances novelty-driven exploration and short-term spatial memory in kindled mice, essentially rescuing the seizure-induced cognitive impairment. In addition, we found that dopamine has a dual effect on LTP in control versus kindled mice, such that application of dopamine prevented LTP induction in slices from control mice, but rescued LTP in slices taken from the kindled animal. Taken together, our results highlight the potential for dopaminergic modulation in improving synaptic plasticity and cognitive function following seizure.
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Affiliation(s)
- Mahboubeh Ahmadi
- Department of Physiology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran 1411713116, Iran
| | - Nahid Rouhi
- Department of Physiology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran 1411713116, Iran
| | - Yaghoub Fathollahi
- Department of Physiology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran 1411713116, Iran
| | - Amir Shojaei
- Department of Physiology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran 1411713116, Iran
| | - Mahmoud Rezaei
- Department of Physiology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran 1411713116, Iran
| | - Sareh Rostami
- Department of Physiology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran 1411713116, Iran
| | - Bechara J Saab
- Preclinical Laboratory for Translational Research into Affective Disorders, DPPP, Psychiatric Hospital, University of Zurich, Zurich CH-8008, Switzerland
- Neuroscience Center Zurich, University of Zurich and ETH, Zurich 8057, Switzerland
- Mobio Interactive Pte. Ltd., 389637, Singapore, Republic of Singapore
| | - Javad Mirnajafi-Zadeh
- Department of Physiology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran 1411713116, Iran
- Institute for Brain Sciences and Cognition, Tarbiat Modares University, Tehran 1411713116, Iran
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4
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Tallarico M, Pisano M, Leo A, Russo E, Citraro R, De Sarro G. Antidepressant Drugs for Seizures and Epilepsy: Where do we Stand? Curr Neuropharmacol 2023; 21:1691-1713. [PMID: 35761500 PMCID: PMC10514547 DOI: 10.2174/1570159x20666220627160048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2022] [Revised: 06/13/2022] [Accepted: 06/18/2022] [Indexed: 11/22/2022] Open
Abstract
People with epilepsy (PWE) are more likely to develop depression and both these complex chronic diseases greatly affect health-related quality of life (QOL). This comorbidity contributes to the deterioration of the QOL further than increasing the severity of epilepsy worsening prognosis. Strong scientific evidence suggests the presence of shared pathogenic mechanisms. The correct identification and management of these factors are crucial in order to improve patients' QOL. This review article discusses recent original research on the most common pathogenic mechanisms of depression in PWE and highlights the effects of antidepressant drugs (ADs) against seizures in PWE and animal models of seizures and epilepsy. Newer ADs, such as selective serotonin reuptake inhibitors (SRRI) or serotonin-noradrenaline reuptake inhibitors (SNRI), particularly sertraline, citalopram, mirtazapine, reboxetine, paroxetine, fluoxetine, escitalopram, fluvoxamine, venlafaxine, duloxetine may lead to improvements in epilepsy severity whereas the use of older tricyclic antidepressant (TCAs) can increase the occurrence of seizures. Most of the data demonstrate the acute effects of ADs in animal models of epilepsy while there is a limited number of studies about the chronic antidepressant effects in epilepsy and epileptogenesis or on clinical efficacy. Much longer treatments are needed in order to validate the effectiveness of these new alternatives in the treatment and the development of epilepsy, while further clinical studies with appropriate protocols are warranted in order to understand the real potential contribution of these drugs in the management of PWE (besides their effects on mood).
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Affiliation(s)
- Martina Tallarico
- System and Applied Pharmacology, Science of Health Department, School of Medicine, Magna Graecia University of Catanzaro, Catanzaro, Italy
| | - Maria Pisano
- System and Applied Pharmacology, Science of Health Department, School of Medicine, Magna Graecia University of Catanzaro, Catanzaro, Italy
| | - Antonio Leo
- System and Applied Pharmacology, Science of Health Department, School of Medicine, Magna Graecia University of Catanzaro, Catanzaro, Italy
| | - Emilio Russo
- System and Applied Pharmacology, Science of Health Department, School of Medicine, Magna Graecia University of Catanzaro, Catanzaro, Italy
| | - Rita Citraro
- System and Applied Pharmacology, Science of Health Department, School of Medicine, Magna Graecia University of Catanzaro, Catanzaro, Italy
| | - Giovambattista De Sarro
- System and Applied Pharmacology, Science of Health Department, School of Medicine, Magna Graecia University of Catanzaro, Catanzaro, Italy
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5
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Channer B, Matt SM, Nickoloff-Bybel EA, Pappa V, Agarwal Y, Wickman J, Gaskill PJ. Dopamine, Immunity, and Disease. Pharmacol Rev 2023; 75:62-158. [PMID: 36757901 PMCID: PMC9832385 DOI: 10.1124/pharmrev.122.000618] [Citation(s) in RCA: 53] [Impact Index Per Article: 53.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Revised: 08/02/2022] [Accepted: 08/04/2022] [Indexed: 12/14/2022] Open
Abstract
The neurotransmitter dopamine is a key factor in central nervous system (CNS) function, regulating many processes including reward, movement, and cognition. Dopamine also regulates critical functions in peripheral organs, such as blood pressure, renal activity, and intestinal motility. Beyond these functions, a growing body of evidence indicates that dopamine is an important immunoregulatory factor. Most types of immune cells express dopamine receptors and other dopaminergic proteins, and many immune cells take up, produce, store, and/or release dopamine, suggesting that dopaminergic immunomodulation is important for immune function. Targeting these pathways could be a promising avenue for the treatment of inflammation and disease, but despite increasing research in this area, data on the specific effects of dopamine on many immune cells and disease processes remain inconsistent and poorly understood. Therefore, this review integrates the current knowledge of the role of dopamine in immune cell function and inflammatory signaling across systems. We also discuss the current understanding of dopaminergic regulation of immune signaling in the CNS and peripheral tissues, highlighting the role of dopaminergic immunomodulation in diseases such as Parkinson's disease, several neuropsychiatric conditions, neurologic human immunodeficiency virus, inflammatory bowel disease, rheumatoid arthritis, and others. Careful consideration is given to the influence of experimental design on results, and we note a number of areas in need of further research. Overall, this review integrates our knowledge of dopaminergic immunology at the cellular, tissue, and disease level and prompts the development of therapeutics and strategies targeted toward ameliorating disease through dopaminergic regulation of immunity. SIGNIFICANCE STATEMENT: Canonically, dopamine is recognized as a neurotransmitter involved in the regulation of movement, cognition, and reward. However, dopamine also acts as an immune modulator in the central nervous system and periphery. This review comprehensively assesses the current knowledge of dopaminergic immunomodulation and the role of dopamine in disease pathogenesis at the cellular and tissue level. This will provide broad access to this information across fields, identify areas in need of further investigation, and drive the development of dopaminergic therapeutic strategies.
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Affiliation(s)
- Breana Channer
- Department of Pharmacology and Physiology, Drexel University College of Medicine, Philadelphia, Pennsylvania (B.C., S.M.M., E.A.N-B., Y.A., J.W., P.J.G.); and The Children's Hospital of Philadelphia Research Institute, Philadelphia, Pennsylvania (V.P.)
| | - Stephanie M Matt
- Department of Pharmacology and Physiology, Drexel University College of Medicine, Philadelphia, Pennsylvania (B.C., S.M.M., E.A.N-B., Y.A., J.W., P.J.G.); and The Children's Hospital of Philadelphia Research Institute, Philadelphia, Pennsylvania (V.P.)
| | - Emily A Nickoloff-Bybel
- Department of Pharmacology and Physiology, Drexel University College of Medicine, Philadelphia, Pennsylvania (B.C., S.M.M., E.A.N-B., Y.A., J.W., P.J.G.); and The Children's Hospital of Philadelphia Research Institute, Philadelphia, Pennsylvania (V.P.)
| | - Vasiliki Pappa
- Department of Pharmacology and Physiology, Drexel University College of Medicine, Philadelphia, Pennsylvania (B.C., S.M.M., E.A.N-B., Y.A., J.W., P.J.G.); and The Children's Hospital of Philadelphia Research Institute, Philadelphia, Pennsylvania (V.P.)
| | - Yash Agarwal
- Department of Pharmacology and Physiology, Drexel University College of Medicine, Philadelphia, Pennsylvania (B.C., S.M.M., E.A.N-B., Y.A., J.W., P.J.G.); and The Children's Hospital of Philadelphia Research Institute, Philadelphia, Pennsylvania (V.P.)
| | - Jason Wickman
- Department of Pharmacology and Physiology, Drexel University College of Medicine, Philadelphia, Pennsylvania (B.C., S.M.M., E.A.N-B., Y.A., J.W., P.J.G.); and The Children's Hospital of Philadelphia Research Institute, Philadelphia, Pennsylvania (V.P.)
| | - Peter J Gaskill
- Department of Pharmacology and Physiology, Drexel University College of Medicine, Philadelphia, Pennsylvania (B.C., S.M.M., E.A.N-B., Y.A., J.W., P.J.G.); and The Children's Hospital of Philadelphia Research Institute, Philadelphia, Pennsylvania (V.P.)
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6
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Zavala-Tecuapetla C, Luna-Munguia H, López-Meraz ML, Cuellar-Herrera M. Advances and Challenges of Cannabidiol as an Anti-Seizure Strategy: Preclinical Evidence. Int J Mol Sci 2022; 23:ijms232416181. [PMID: 36555823 PMCID: PMC9783044 DOI: 10.3390/ijms232416181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2022] [Revised: 11/24/2022] [Accepted: 12/16/2022] [Indexed: 12/23/2022] Open
Abstract
The use of Cannabis for medicinal purposes has been documented since ancient times, where one of its principal cannabinoids extracted from Cannabis sativa, cannabidiol (CBD), has emerged over the last few years as a promising molecule with anti-seizure potential. Here, we present an overview of recent literature pointing out CBD's pharmacological profile (solubility, metabolism, drug-drug interactions, etc.,), CBD's interactions with multiple molecular targets as well as advances in preclinical research concerning its anti-seizure effect on both acute seizure models and chronic models of epilepsy. We also highlight the recent attention that has been given to other natural cannabinoids and to synthetic derivatives of CBD as possible compounds with therapeutic anti-seizure potential. All the scientific research reviewed here encourages to continue to investigate the probable therapeutic efficacy of CBD and its related compounds not only in epilepsy but also and specially in drug-resistant epilepsy, since there is a dire need for new and effective drugs to treat this disease.
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Affiliation(s)
- Cecilia Zavala-Tecuapetla
- Laboratory of Physiology of Reticular Formation, National Institute of Neurology and Neurosurgery, Insurgentes Sur 3877, La Fama, Mexico City 14269, Mexico
- Correspondence:
| | - Hiram Luna-Munguia
- Departamento de Neurobiologia Conductual y Cognitiva, Instituto de Neurobiologia, Universidad Nacional Autonoma de Mexico, Campus UNAM-Juriquilla, Queretaro 76230, Mexico
| | - María-Leonor López-Meraz
- Instituto de Investigaciones Cerebrales, Universidad Veracruzana, Luis Castelazo Ayala s/n, Col. Industrial Ánimas, Xalapa 91190, Mexico
| | - Manola Cuellar-Herrera
- Epilepsy Clinic, Hospital General de México Dr. Eduardo Liceaga, Dr. Balmis 148, Doctores, Mexico City 06720, Mexico
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7
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Rezaei M, Ghafouri S, Asgari A, Barkley V, Fathollahi Y, Rostami S, Shojaei A, Mirnajafi‐Zadeh J. Involvement of dopamine D 2 -like receptors in the antiepileptogenic effects of deep brain stimulation during kindling in rats. CNS Neurosci Ther 2022; 29:587-596. [PMID: 36514209 PMCID: PMC9873507 DOI: 10.1111/cns.14059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 07/25/2022] [Accepted: 11/30/2022] [Indexed: 12/15/2022] Open
Abstract
AIMS Deep brain electrical stimulation (DBS), as a potential therapy for drug resistive epileptic patients, has inhibitory action on epileptogenesis. In the present investigation, the role of dopamine D2 -like receptors in the antiepileptogenic action of DBS was studied. METHODS Seizures were induced in adult rats by stimulating the perforant path in a semi-rapid kindling method. Five minutes after the last kindling stimulation, daily DBS was applied to the perforant path at the pattern of low frequency stimulation (LFS; 1 Hz; pulse duration: 0.1 ms; intensity: 50-150 μA; 4 trains of 200 pulses at 5 min intervals). Sulpiride (10 μg/1 μl, i.c.v.), a selective dopamine D2 -like receptor antagonist, was administered prior to the daily LFS application. RESULTS Kindling stimulations increased cumulative daily behavioral seizure stages, daily afterdischarge duration (dADD), and population spike amplitude (PS) in dentate gyrus following perforant path stimulation, while applying LFS decreased the kindled seizures' parameters. In addition, kindling potentiated the early (at 10-50 ms inter-pulse interval) and late (at 150-1000 ms inter-pulse interval) paired-pulse inhibition and decreased the paired-pulse facilitation (at 70-100 ms inter-pulse interval). These effects were also inhibited by applying LFS. All inhibitory effects of LFS on kindling procedure were prevented by sulpiride administration. CONCLUSION These data may suggest that LFS exerts its preventive effect on kindling development, at least partly, through the receptors on which sulpiride acts which are mainly dopamine D2 -like (including D2 , D3 , and D4 ) receptors.
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Affiliation(s)
- Mahmoud Rezaei
- Department of Physiology, Faculty of Medical SciencesTarbiat Modares UniversityTehranIran
| | - Samireh Ghafouri
- Department of Physiology, Faculty of Medical SciencesTarbiat Modares UniversityTehranIran
| | - Azam Asgari
- Department of BiologyUniversity of VictoriaVictoriaBritish ColumbiaCanada
| | - Victoria Barkley
- Krembil Research InstituteUniversity Health NetworkTorontoOntarioCanada
| | - Yaghoub Fathollahi
- Department of Physiology, Faculty of Medical SciencesTarbiat Modares UniversityTehranIran
| | - Sareh Rostami
- Department of Physiology, Faculty of Medical SciencesTarbiat Modares UniversityTehranIran
| | - Amir Shojaei
- Department of Physiology, Faculty of Medical SciencesTarbiat Modares UniversityTehranIran
| | - Javad Mirnajafi‐Zadeh
- Department of Physiology, Faculty of Medical SciencesTarbiat Modares UniversityTehranIran,Institute for Brain Sciences and CognitionTarbiat Modares UniversityTehranIran
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8
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Araújo Delmondes GD, Pereira Lopes MJ, Araújo IM, de Sousa Borges A, Batista PR, Melo Coutinho HD, Alencar de Menezes IR, Barbosa-Filho JM, Bezerra Felipe CF, Kerntopf MR. Possible mechanisms involved in the neuroprotective effect of Trans,trans-farnesol on pilocarpine-induced seizures in mice. Chem Biol Interact 2022; 365:110059. [PMID: 35931201 DOI: 10.1016/j.cbi.2022.110059] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 06/24/2022] [Accepted: 07/13/2022] [Indexed: 11/18/2022]
Abstract
This study aimed to investigate, through in vivo and in vitro methodologies, the effect of acute trans,trans-farnesol (12.5, 25, 50 or 100 mg/kg, p.o.) administration on behavioral and neurochemical parameters associated with pilocarpine-induced epileptic seizure (300 mg/kg, i.p.) in mice. The initial results showed that the compound in question presents no anxiolytic-like or myorelaxant effects, despite reducing locomotor activity in the animals at all doses tested. In addition, the lowest dose increased the latency to onset of the first epileptic seizure, and the time to death. In addition to decreasing the mortality percentage in mice submitted to the pilocarpine model. In this same model, pretreatment with the lowest dose of the compound decreased the hippocampal concentrations of thiobarbituric acid and nitrite, and partially restored striatal concentrations of noradrenaline, dopamine, and serotonin. Taken together, the results suggest that trans,trans-farnesol presents a central depressant effect which contributes to its antiepileptic action which, in turn, seems to be mediated by the antagonism of muscarinic cholinergic receptors, reduction of oxidative stress. and modulation of noradrenaline, dopamine and serotonin concentrations in the central nervous system.
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Affiliation(s)
- Gyllyandeson de Araújo Delmondes
- Postgraduate Program in Biological Chemistry, Regional University of Cariri, Crato, CE, Brazil; Natural Products Pharmacology Laboratory, Regional University of Cariri, Crato, CE, Brazil.
| | | | - Isaac Moura Araújo
- Postgraduate Program in Biological Chemistry, Regional University of Cariri, Crato, CE, Brazil
| | - Alex de Sousa Borges
- Postgraduate Program in Biological Chemistry, Regional University of Cariri, Crato, CE, Brazil
| | - Paulo Ricardo Batista
- Postgraduate Program in Biological Chemistry, Regional University of Cariri, Crato, CE, Brazil
| | | | | | | | | | - Marta Regina Kerntopf
- Postgraduate Program in Biological Chemistry, Regional University of Cariri, Crato, CE, Brazil; Natural Products Pharmacology Laboratory, Regional University of Cariri, Crato, CE, Brazil
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9
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Trindade-Filho EM, Pai JD, Castro DND, Silva ATMD, Costa AF, Vieira JSS, Santos SDBD, Félix VB, Leão SABF, Zambrano LI, Saldanha-Filho AJM, Carvalho EGA, Cavalcante JBN, Quintella GB, Lino ATS, Costa MV, Lima JA, Tavares MMA, de Melo MR, Mousinho KC, Biase CLCLD, Leite ML, Costa PJMS, Becker EL, Moura IMFB, Silva JCD. Dopamine depletion in wistar rats with epilepsy. BRAZ J BIOL 2022; 84:e248411. [PMID: 35544785 DOI: 10.1590/1519-6984.248411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Accepted: 02/20/2022] [Indexed: 11/22/2022] Open
Abstract
The dopamine content in cerebral structures has been related to neuronal excitability and several approaches have been used to study this phenomenon during seizure vulnerability period. In the present work, we describe the effects of dopamine depletion after the administration of 6-hidroxidopamine (6-OHDA) into the substantia nigra pars compacta of male rats submitted to the pilocarpine model of epilepsy. Susceptibility to pilocarpine-induced status epilepticus (SE), as well as spontaneous and recurrent seizures (SRSs) frequency during the chronic period of the model were determined. Since the hippocampus is one of main structures in the development of this experimental model of epilepsy, the dopamine levels in this region were also determined after drug administration. In the first experiment, 62% (15/24) of 6-OHDA pre-treated rats and 45% (11/24) of those receiving ascorbic acid as control solution progressed to motor limbic seizures evolving to SE, after the administration of pilocarpine. Severeness of seizures during the model´s the acute period, was significantly higher in epileptic experimental rats (56.52%), than in controls (4.16%). In the second experiment, the frequency of seizures in the model's chronic phase did not significantly change between groups. Our data show that dopamine may play an important role on seizure severity in the pilo's model acute period, which seems to be due to dopamine inhibitory action on motor expression of seizure.
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Affiliation(s)
- E M Trindade-Filho
- Centro Universitário - CESMAC, Campus I, Maceió, AL, Brasil.,Universidade Estadual de Ciências da Saúde de Alagoas - UNCISAL, Maceió, AL, Brasil
| | - J Dal Pai
- Instituto do Cérebro do Rio Grande do Sul - InsCer, Porto Alegre, RS, Brasil
| | - D N de Castro
- Centro Universitário - CESMAC, Campus I, Maceió, AL, Brasil
| | - A T M da Silva
- Centro Universitário - CESMAC, Campus I, Maceió, AL, Brasil
| | - A F Costa
- Centro Universitário - CESMAC, Campus I, Maceió, AL, Brasil
| | - J S S Vieira
- Centro Universitário - CESMAC, Campus I, Maceió, AL, Brasil
| | | | - V B Félix
- Centro Universitário - CESMAC, Campus I, Maceió, AL, Brasil.,Hospital Universitário de Alagoas Professor Alberto Antunes - HUPAA, Maceió, AL, Brasil
| | - S A B F Leão
- Santa Casa de Misericórdia de Maceió, AL, Brasil.,Universidade Federal de Alagoas - UFAL, Campus de Arapiraca, AL, Brasil
| | - L I Zambrano
- Universidad Nacional Autónoma de Honduras - UNAH, Facultad de Ciencias Medicas, Tegucigalpa, Honduras
| | - A J M Saldanha-Filho
- Centro Universitário - CESMAC, Campus I, Maceió, AL, Brasil.,Centro Universitário Tiradentes - UNIT-AL, Maceió, AL, Brasil
| | - E G A Carvalho
- Centro Universitário Tiradentes - UNIT-PE, Jaboatão dos Guararapes, Pernambuco, PE, Brasil
| | - J B N Cavalcante
- Universidade Estadual de Ciências da Saúde de Alagoas - UNCISAL, Maceió, AL, Brasil
| | - G B Quintella
- Centro Universitário - CESMAC, Campus I, Maceió, AL, Brasil
| | - A T S Lino
- Universidade Federal de Alagoas - UFAL, Campus de Rio Largo, Alagoas, Brasil
| | - M V Costa
- Centro Universitário - CESMAC, Campus I, Maceió, AL, Brasil.,Universidade Estadual de Ciências da Saúde de Alagoas - UNCISAL, Maceió, AL, Brasil
| | - J A Lima
- Centro Universitário - CESMAC, Campus I, Maceió, AL, Brasil.,Universidade Estadual de Ciências da Saúde de Alagoas - UNCISAL, Maceió, AL, Brasil
| | - M M A Tavares
- Centro Universitário - CESMAC, Campus I, Maceió, AL, Brasil
| | - M R de Melo
- Centro Universitário - CESMAC, Campus I, Maceió, AL, Brasil
| | - K C Mousinho
- Centro Universitário - CESMAC, Campus I, Maceió, AL, Brasil.,Universidade Estadual de Ciências da Saúde de Alagoas - UNCISAL, Maceió, AL, Brasil
| | - C L C L De Biase
- Hospital Universitário de Alagoas Professor Alberto Antunes - HUPAA, Maceió, AL, Brasil
| | - M L Leite
- Universidade Estadual de Ciências da Saúde de Alagoas - UNCISAL, Maceió, AL, Brasil
| | - P J M S Costa
- Universidade Estadual de Ciências da Saúde de Alagoas - UNCISAL, Maceió, AL, Brasil
| | - E L Becker
- Centro Universitário - CESMAC, Campus I, Maceió, AL, Brasil
| | - I M F B Moura
- Centro Universitário - CESMAC, Campus I, Maceió, AL, Brasil
| | - J C da Silva
- Centro Universitário - CESMAC, Campus I, Maceió, AL, Brasil.,Universidade Estadual de Ciências da Saúde de Alagoas - UNCISAL, Maceió, AL, Brasil
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10
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Carrillo-Ruiz JD, Armas-Salazar A, Navarro-Olvera JL, Beltrán JQ, Bowles B, González-Garibay G, Lee Á. Bibliometric Analysis of Mexican Publications on Stereotactic and Functional Neurosurgery From 1949 to 2021. Front Surg 2022; 9:886391. [PMID: 35615655 PMCID: PMC9124808 DOI: 10.3389/fsurg.2022.886391] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Accepted: 03/31/2022] [Indexed: 11/20/2022] Open
Abstract
Background Stereotactic and functional neurosurgery (SFN) is a rapidly evolving field and some emerging countries, especially Mexico, have made significant contributions to this discipline. A bibliometric analysis has never been performed in Latin America, and this would be particularly important to show the areas that remain poorly studied, and design research strategies for the future. Methods Scopus was queried using keywords pertaining to functional neurosurgery, restricting the affiliation country to Mexico, and considering documents published after 1949. Added to the initial search, a complementary literature exploration by author, considering the publications of the most productive neurosurgeons, was performed. A descriptive statistical analysis was carried out. Results From 5,109 articles, only 371 were eligible. Scientific production has gradually increased with time. Epilepsy (31%) and movement disorders (27.4%) were the most studied neurological conditions, whereas the other 41.6% corresponded to pain, behavior disorders, spinal cord injuries, neuromodulation, stereotactic biopsies, and SFN history. Level of evidence was predominantly level V (59.1%). Publication output is highly skewed to Mexico City, which represents 78.4% of national production. Relative to factors associated with impact of research, publications in English had more citations (28.5 mean citations per paper), and journals with an impact factor greater than one had more than 10 mean citations per paper. Conclusions Mexico has experienced an increase in the productivity of SFN literature, addressing the most prevalent issues in the country (epilepsy and motor disorders). However, it is necessary to report studies with a higher level of evidence, as well as to decentralize the research collaborating with national institutions outside Mexico City. On the other hand, it is imperative to promote scientific production in English and in high-impact indexed journals to increase the visibility of our production. We would like to call upon our colleagues in other countries to reproduce our methodology, in order to determine the factors associated with the impact and productivity on SFN research.
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Affiliation(s)
- José Damián Carrillo-Ruiz
- Unit for Stereotactic and Functional Neurosurgery, and Research Direction, General Hospital of Mexico, Mexico City, Mexico
- Faculty of Health Sciences Direction of Anahuac University Mexico, Mexico City, Mexico
| | - Armando Armas-Salazar
- Unit for Stereotactic and Functional Neurosurgery, and Research Direction, General Hospital of Mexico, Mexico City, Mexico
- Postgraduate Department, School of Higher Education in Medicine, National Polytechnic Institute, Mexico City, Mexico
| | - José Luis Navarro-Olvera
- Unit for Stereotactic and Functional Neurosurgery, and Research Direction, General Hospital of Mexico, Mexico City, Mexico
| | - Jesús Q. Beltrán
- Unit for Stereotactic and Functional Neurosurgery, and Research Direction, General Hospital of Mexico, Mexico City, Mexico
| | - Brigham Bowles
- Instituto Nacional de Neurología y Neurocirugía, Neuroendovascular Therapy, Mexico City, Mexico
| | | | - Ángel Lee
- Instituto Nacional de Neurología y Neurocirugía, Neuroendovascular Therapy, Mexico City, Mexico
- Comisión Coordinadora de Institutos Nacionales de Salud y Hospitales de Alta Especialidad, Mexico City, Mexico
- *Correspondence: Ángel Lee
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11
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An insight into crosstalk among multiple signaling pathways contributing to epileptogenesis. Eur J Pharmacol 2021; 910:174469. [PMID: 34478688 DOI: 10.1016/j.ejphar.2021.174469] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 08/16/2021] [Accepted: 08/30/2021] [Indexed: 01/04/2023]
Abstract
Despite the years of research, epilepsy remains uncontrolled in one-third of afflicted individuals and poses a health and economic burden on society. Currently available anti-epileptic drugs mainly target the excitatory-inhibitory imbalance despite targeting the underlying pathophysiology of the disease. Recent research focuses on understanding the pathophysiologic mechanisms that lead to seizure generation and on possible new treatment avenues for preventing epilepsy after a brain injury. Various signaling pathways, including the mechanistic target of rapamycin (mTOR) pathway, mitogen-activated protein kinase (MAP-ERK) pathway, JAK-STAT pathway, wnt/β-catenin signaling, cAMP pathway, and jun kinase pathway, have been suggested to play an essential role in this regard. Recent work suggests that the mTOR pathway intervenes epileptogenesis and proposes that mTOR inhibitors may have antiepileptogenic properties for epilepsy. In the same way, several animal studies have indicated the involvement of the Wnt signaling pathway in neurogenesis and neuronal death induced by seizures in different phases (acute and chronic) of seizure development. Various studies have also documented the activation of JAK-STAT signaling in epilepsy and cAMP involvement in epileptogenesis through CREB (cAMP response element-binding protein). Although studies are there, the mechanism for how components of these pathways mediate epileptogenesis requires further investigation. This review summarises the current role of various signaling pathways involved in epileptogenesis and the crosstalk among them. Furthermore, we will also discuss the mechanical base for the interaction between these pathways and how these interactions could be a new emerging promising target for future epilepsy therapies.
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12
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ERK1/2 kinases and dopamine D2 receptors participate in the anticonvulsant effects of a new derivative of benzoylpyridine oxime and valproic acid. Eur J Pharmacol 2021; 903:174150. [PMID: 33961874 DOI: 10.1016/j.ejphar.2021.174150] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 04/26/2021] [Accepted: 04/30/2021] [Indexed: 01/11/2023]
Abstract
Inhibition of the activity of extracellular signal-regulated kinases (ERK1/2) induced by the activation of the dopamine D2 receptor signalling cascade may be a promising pharmacological target. The aim of this work was to study the involvement of ERK1/2 and dopamine D2 receptor in the mechanism of the anticonvulsant action of valproic acid (VA) and a new benzoylpyridine oxime derivative (GIZH-298), which showed antiepileptic activity in different models of epilepsy. We showed that subchronic exposure to maximal electroshock seizures (MES) for 5 days reduced the density of dopamine D2 receptors in the striatum of mice. GIZH-298 counteracted the decrease in the number of dopamine D2 receptors associated with MES and increased the number of ligand binding sites of dopamine D2 receptors in mice without MES. The affinity of dopamine D2 receptors to the ligand was not changed by GIZH-298. MES caused an increase in ERK1/2 and synapsin I phosphorylation in the striatum while GIZH-298, similar to VA, reduced the levels of both phospho-ERK1/2 and phosphosynapsin I after MES, which correlated with the decrease in the intensity of seizure in mice. In addition, GIZH-298 suppressed ERK1/2 phosphorylation in SH-SY5Y human neuroblastoma cells at therapeutic concentrations, while VA inhibited ERK1/2 phosphorylation in vivo but not in vitro. The data obtained expand the understanding of the mechanisms of action of VA and GIZH-298, which involve regulating the activity of ERK1/2 kinases, probably by modulating dopamine D2 receptors in limbic structures, as well as (in the case of GIZH-298) directly inhibiting of the ERK1/2 cascade.
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13
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Majumdar S, Gupta S, Prajapati SK, Krishnamurthy S. Neuro-nutraceutical potential of Asparagus racemosus: A review. Neurochem Int 2021; 145:105013. [PMID: 33689806 DOI: 10.1016/j.neuint.2021.105013] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 03/02/2021] [Accepted: 03/03/2021] [Indexed: 02/06/2023]
Abstract
Debilitating neuropsychiatric and neurodegenerative conditions are associated with complex multifactorial pathophysiology. Their treatment strategies often only provide symptomatic relief, delaying disease progression without giving a complete cure. Potent and safer treatment alternatives beyond symptomatic relief are sought. Herbal supplements have surely been explored due to their multiple component nature to enhance the effect of western medications. One such well-documented nutraceutical in the ancient Greek, Chinese, and Ayurvedic medicine system known for its various medicinal benefits is Asparagus racemosus. Widely used for its lactogenic properties, A. racemosus is also cited in Ayurveda as a nervine tonic. A. racemosus based nutraceuticals have shown to possess adaptogenic, neuroprotective, antioxidant, anti-inflammatory, and nootropic activity under preclinical and clinical settings without posing significant adverse effects. A. racemosus extracts restore the perturbed neurotransmitters and prevent oxidative neuronal damage. From the available neuropharmacological researches, the physiological actions of A. racemosus can ultimately be directed for either augmentation of cognitive ability or in the management of neurological conditions such as stress, anxiety, depression, epilepsy, Parkinson's, and Alzheimer's disease. The studies focus on the multi-component extract, and the lack of standardization has been a major hurdle in preventing the allotment of reported neuropharmacological activity to one of the phytoconstituent. Herbal standardization of the plant extract based on a specific biomarker can help elucidate the intricate biomolecular pathway and neurocircuitries being involved. This, followed by rigorous standardized clinical trials, fixing dosages, and determining contraindications would facilitate the translation of A. racemosus to a FDA-approved neuromedicine for neurological disorders.
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Affiliation(s)
- Shreyasi Majumdar
- Neurotherapeutics Laboratory, Department of Pharmaceutical Engineering and Technology, Indian Institute of Technology (Banaras Hindu University), Varanasi, 221005, India
| | - Smriti Gupta
- Neurotherapeutics Laboratory, Department of Pharmaceutical Engineering and Technology, Indian Institute of Technology (Banaras Hindu University), Varanasi, 221005, India
| | - Santosh Kumar Prajapati
- Neurotherapeutics Laboratory, Department of Pharmaceutical Engineering and Technology, Indian Institute of Technology (Banaras Hindu University), Varanasi, 221005, India
| | - Sairam Krishnamurthy
- Neurotherapeutics Laboratory, Department of Pharmaceutical Engineering and Technology, Indian Institute of Technology (Banaras Hindu University), Varanasi, 221005, India.
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14
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Vieira ÉLM, da Silva MCM, Gonçalves AP, Martins GL, Teixeira AL, de Oliveira ACP, Reis HJ. Serotonin and dopamine receptors profile on peripheral immune cells from patients with temporal lobe epilepsy. J Neuroimmunol 2021; 354:577534. [PMID: 33713941 DOI: 10.1016/j.jneuroim.2021.577534] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 02/27/2021] [Accepted: 02/27/2021] [Indexed: 01/11/2023]
Abstract
The role of inflammation and immune cells has been demonstrated in neurological diseases, including epilepsy. Leukocytes, as well as inflammatory mediators, contribute to abnormal processes that lead to a reduction in seizure threshold and synaptic reorganization. In this sense, identifying different phenotypes of circulating immune cells is essential to understanding the role of these cells in epilepsy. Immune cells can express a variety of surface markers, including neurotransmitter receptors, such as serotonin and dopamine. Alteration in these receptors expression patterns may affect the level of inflammatory mediators and the pathophysiology of epilepsy. Therefore, in the current study, we evaluated the expression of dopamine and serotonin receptors on white blood cells from patients with temporal lobe epilepsy with hippocampal sclerosis (TLE-HS). Blood samples from 17 patients with TLE-HS and 21 controls were collected. PBMC were isolated and stained ex vivo for flow cytometry. We evaluated the expression of serotonin (5-HT1A, 5-HT1B, 5-HT2, 5-HT2B, 5-HT2C, 5-HT3, 5-HT4), and dopamine receptors (D1, D2, D3, D4, and D5) on the cell surface of lymphocytes and innate immune cells (monocytes and granulocytes). Our results demonstrated that innate cells and lymphocytes from patients with TLE-HS showed high mean fluorescent intensity (MFI) for 5-HT1A, 5-HT1B, 5-HT2A, and 5-HT4 compared to controls. No difference was observed for 5-HT2B. For dopamine receptors, the expression of D1, D2, D4, and D5 receptors was higher on innate cells from patients with TLE-HS when compared to controls for the MFI. Regarding lymphocytes population, D2 expression was increased in patients with TLE-HS. In conclusion, there are alterations in the expression of serotonin and dopamine receptors on immune blood cells of patients with TLE-HS. Although the biological significance of these findings still needs to be further investigated, these changes may contribute to the understanding of TLE-HS pathophysiology.
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Affiliation(s)
| | - Maria Carolina Machado da Silva
- Laboratório de Neurofarmacologia, Departamento de Farmacologia, ICB, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil
| | - Ana Paula Gonçalves
- Programa de Neurociências, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil
| | - Gabriela Lopes Martins
- Laboratório de Neurofarmacologia, Departamento de Farmacologia, ICB, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil
| | - Antônio Lúcio Teixeira
- Instituto de Ensino e Pesquisa, Santa Casa BH, Belo Horizonte 30260-070, Brazil; Neuropsychiatry Program and Immuno-Psychiatry Lab, Department of Psychiatry and Behavioral Sciences, UT Health Houston, 1941 East Road, Houston, TX 77054, USA
| | - Antônio Carlos Pinheiro de Oliveira
- Laboratório de Neurofarmacologia, Departamento de Farmacologia, ICB, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil; Programa de Neurociências, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil.
| | - Helton José Reis
- Laboratório de Neurofarmacologia, Departamento de Farmacologia, ICB, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil; Programa de Neurociências, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil.
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15
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Du T, Chen Y, Shi L, Liu D, Liu Y, Yuan T, Zhang X, Zhu G, Zhang J. Deep brain stimulation of the anterior nuclei of the thalamus relieves basal ganglia dysfunction in monkeys with temporal lobe epilepsy. CNS Neurosci Ther 2020; 27:341-351. [PMID: 33085171 PMCID: PMC7871793 DOI: 10.1111/cns.13462] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 09/19/2020] [Accepted: 09/21/2020] [Indexed: 12/20/2022] Open
Abstract
Aims Deep brain stimulation of the anterior nuclei of the thalamus (ANT‐DBS) is effective in temporal lobe epilepsy (TLE). Previous studies have shown that the basal ganglia are involved in seizure propagation in TLE, but the effects of ANT‐DBS on the basal ganglia have not been clarified. Methods ANT‐DBS was applied to monkeys with kainic acid–induced TLE using a robot‐assisted system. Behavior was monitored continuously. Immunofluorescence analysis and Western blotting were used to estimate protein expression levels in the basal ganglia and the effects of ANT stimulation. Results The seizure frequency decreased after ANT‐DBS. D1 and D2 receptor levels in the putamen and caudate were significantly higher in the ANT‐DBS group than in the epilepsy (EP) model. Neuronal loss and apoptosis were less severe in the ANT‐DBS group. Glutamate receptor 1 (GluR1) in the nucleus accumbens (NAc) shell and globus pallidus internus (GPi) increased in the EP group but decreased after ANT‐DBS. γ‐Aminobutyric acid receptor A (GABAA‐R) decreased and glutamate decarboxylase 67 (GAD67) increased in the GPi of the EP group, whereas the reverse tendencies were observed after ANT‐DBS. Conclusion ANT‐DBS exerts neuroprotective effects on the caudate and putamen, enhances D1 and D2 receptor expression, and downregulates GPi overactivation, which enhanced the antiepileptic function of the basal ganglia.
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Affiliation(s)
- Tingting Du
- Department of Functional Neurosurgery, Beijing Neurosurgical Institute, Capital Medical University, Beijing, China
| | - Yingchuan Chen
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Lin Shi
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Defeng Liu
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Yuye Liu
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Tianshuo Yuan
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Xin Zhang
- Department of Functional Neurosurgery, Beijing Neurosurgical Institute, Capital Medical University, Beijing, China
| | - Guanyu Zhu
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Jianguo Zhang
- Department of Functional Neurosurgery, Beijing Neurosurgical Institute, Capital Medical University, Beijing, China.,Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China.,Beijing Key Laboratory of Neurostimulation, Beijing, China
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16
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Vargas-Romero F, González-Barrios R, Guerra-Calderas L, Escobedo-Avila I, Cortés-Pérez D, López-Ornelas A, Rocha L, Soto-Reyes E, Velasco I. Histamine Modulates Midbrain Dopamine Neuron Differentiation Through the Regulation of Epigenetic Marks. Front Cell Neurosci 2019; 13:215. [PMID: 31178697 PMCID: PMC6536891 DOI: 10.3389/fncel.2019.00215] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Accepted: 04/29/2019] [Indexed: 01/18/2023] Open
Abstract
During midbrain development, dopamine neuron differentiation occurs before birth. Epigenetic processes such as DNA methylation and demethylation as well as post-translational modification of histones occur during neurogenesis. Here, we administered histamine (HA) into the brain of E12 embryos in vivo and observed significant lower immunoreactivity of Lmx1a+ and Tyrosine Hydroxylase (TH)+ cells, with parallel decreases in the expression of early (Lmx1a, Msx1) and late (Th) midbrain dopaminergic (mDA) genes. With MeDIP assays we found that HA decreases the percentage of 5-methylcytosine of Pitx3 and Th, without changes in 5-hydroxymethylcytosine. Additionally, HA treatment caused a significant increase in the repressive epigenetic modifications H3K9me3 in Pitx3 and Th, and also more H3K27me3 marks in Th. Furthermore, HA has a long-term effect on the formation of the nigrostriatal and mesolimbic/mesocortical pathways, since it causes a significant decrease in midbrain TH immunoreactivity, as well as alterations in dopaminergic neuronal fibers, and significant lower TH-positive area in the forebrain in whole-mount stainings. These findings suggest that HA diminishes dopaminergic gene transcription by altering several epigenetic components related to DNA and histone modifications, which affects mDA neuron progression during development.
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Affiliation(s)
- Fernanda Vargas-Romero
- Instituto de Fisiología Celular - Neurociencias, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Rodrigo González-Barrios
- Unidad de Investigación Biomédica en Cáncer, Instituto Nacional de Cancerología-Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Lissania Guerra-Calderas
- Departamento de Ciencias Naturales, Universidad Autonoma Metropolitana, Unidad Cuajimalpa, Mexico City, Mexico
| | - Itzel Escobedo-Avila
- Instituto de Fisiología Celular - Neurociencias, Universidad Nacional Autónoma de México, Mexico City, Mexico.,Laboratorio de Reprogramación Celular, Instituto Nacional de Neurología y Neurocirugía "Manuel Velasco Suárez" - Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Daniel Cortés-Pérez
- Instituto de Fisiología Celular - Neurociencias, Universidad Nacional Autónoma de México, Mexico City, Mexico.,Laboratorio de Reprogramación Celular, Instituto Nacional de Neurología y Neurocirugía "Manuel Velasco Suárez" - Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Adolfo López-Ornelas
- Instituto de Fisiología Celular - Neurociencias, Universidad Nacional Autónoma de México, Mexico City, Mexico.,Laboratorio de Reprogramación Celular, Instituto Nacional de Neurología y Neurocirugía "Manuel Velasco Suárez" - Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Luisa Rocha
- Departamento de Farmacobiologia, Centro de Investigación y de Estudios Avanzados (Cinvestav), Mexico City, Mexico
| | - Ernesto Soto-Reyes
- Departamento de Ciencias Naturales, Universidad Autonoma Metropolitana, Unidad Cuajimalpa, Mexico City, Mexico
| | - Iván Velasco
- Instituto de Fisiología Celular - Neurociencias, Universidad Nacional Autónoma de México, Mexico City, Mexico.,Laboratorio de Reprogramación Celular, Instituto Nacional de Neurología y Neurocirugía "Manuel Velasco Suárez" - Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico City, Mexico
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17
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Doherty C, Hogue O, Floden DP, Altemus JB, Najm IM, Eng C, Busch RM. BDNF and COMT, but not APOE, alleles are associated with psychiatric symptoms in refractory epilepsy. Epilepsy Behav 2019; 94:131-136. [PMID: 30909076 PMCID: PMC8299517 DOI: 10.1016/j.yebeh.2019.02.032] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/03/2018] [Accepted: 02/28/2019] [Indexed: 12/14/2022]
Abstract
OBJECTIVE The objective of this study was to determine whether three common genetic polymorphisms [apolipoprotein (APOE) ε4 (rs42938 and rs7412), brain derived neurotrophic factor (BDNF) Met (rs6265), and catechol-O-methyltransferase (COMT) Val (rs4680)] are associated with increased psychiatric symptomatology in individuals with pharmacoresistant epilepsy. METHODS One hundred forty-eight adults (Mage = 38 years; 53% female) with refractory epilepsy completed self-report measures of mood, anxiety, and/or personality/psychopathology. Mann-Whitney U, t-tests, and Fisher's exact tests were used to determine if APOE4, BDNF Val66Met, or COMT Val158Met are associated with increased psychiatric symptomatology in people with epilepsy. RESULTS As a group, BDNF Met carriers reported greater symptoms of depression on the Personality Assessment Inventory (PAI) than those without a Met allele (p = 0.004); COMT Val carriers reported greater symptoms on the PAI Schizophrenia (p = 0.007), Antisocial Features (p = 0.04), and Alcohol Problems (p = 0.03) scales than noncarriers. On the individual level, a significantly greater proportion of BDNF Met carriers demonstrated elevated PAI Depression scores compared to those without a Met allele (p = 0.046). There was also a larger proportion of COMT Val carriers with elevated PAI Anxiety scores as compared to those without a Val allele (p = 0.036). SIGNIFICANCE This retrospective cross-sectional study provides preliminary evidence for a genetic basis of psychiatric comorbidities in epilepsy and suggests that BDNF and COMT may play an important role in the pathophysiology of mental health problems in this vulnerable population.
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Affiliation(s)
- Christine Doherty
- Cleveland Clinic Lerner College of Medicine, Cleveland, OH, United States of America.
| | - Olivia Hogue
- Department of Quantitative Health Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, United States of America.
| | - Darlene P. Floden
- Center for Neurological Restoration, Neurological Institute, Cleveland Clinic, Cleveland, OH,Department of Psychiatry & Psychology, Neurological Institute, Cleveland Clinic, Cleveland, OH
| | - Jessica B. Altemus
- Genomic Medicine Institute, Lerner Research Institute, Cleveland Clinic, Cleveland, OH
| | - Imad M. Najm
- Cleveland Clinic Epilepsy Center, Neurological Institute, Cleveland, OH,Department of Neurology, Neurological Institute, Cleveland Clinic, Cleveland, OH
| | - Charis Eng
- Genomic Medicine Institute, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, United States of America; Department of Genetics and Genome Sciences, Case Western Reserve University School of Medicine, Cleveland, OH, United States of America.
| | - Robyn M. Busch
- Department of Psychiatry & Psychology, Neurological Institute, Cleveland Clinic, Cleveland, OH,Cleveland Clinic Epilepsy Center, Neurological Institute, Cleveland, OH
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18
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Secondary Abnormal CSF Neurotransmitter Metabolite Profiles in a Pediatric Tertiary Care Centre. Can J Neurol Sci 2019; 45:206-213. [PMID: 29506600 DOI: 10.1017/cjn.2017.271] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND Secondary neurotransmitter deficiencies have been reported in several reviews. Our primary aim was to assess the relationship among epilepsy, antiseizure medications, and specific neurotransmitter abnormalities. We also evaluated movement disorders and brain abnormalities via magnetic resonance imaging scans in patients with secondary neurotransmitter defects. METHODS This is a retrospective case series of 376 patients who underwent neurotransmitter analysis at BC Children's Hospital between 2009 and 2013, for a variety of neurological presentations. The biochemical genetics laboratory database was interrogated for results of cerebrospinal fluid neurotransmitter analyses. Clinical data for patients with abnormal results were collected from the hospital charts. Statistical analysis included one-way analysis of variance, chi-square, and a two-way contingency table. RESULTS Abnormal neurotransmitter values were identified in 67 (17.8%) patients, two (0.53%) of which were attributable to a congenital neurotransmitter disorder and 11 (16.9%) secondary to other genetic diagnoses. Of 64 patients with secondary abnormal neurotransmitter values, 38 (59%) presented with epilepsy and 20 (31%) with movement disorders. A combination of epilepsy and movement disorder was less frequent. DISCUSSION Acknowledging the limitations of this retrospective chart review, we conclude that, in our cohort, in addition to patients with movement disorders, a considerable number of patients with epilepsy and epileptic encephalopathy also showed secondary neurotransmitter mono-amine abnormalities. There is no clear relation, however, between clinical phenotype and type of neurotransmitter affected. In addition, no association was identified between the type of antiseizure medications and affected neurotransmitter type. We outline the need for prospective studies to further enrich our understanding of the relation between epilepsy and neurotransmitters with a focus on improving treatments and patient outcomes.
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19
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Luna-Munguia H, Zestos AG, Gliske SV, Kennedy RT, Stacey WC. Chemical biomarkers of epileptogenesis and ictogenesis in experimental epilepsy. Neurobiol Dis 2018; 121:177-186. [PMID: 30304705 DOI: 10.1016/j.nbd.2018.10.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 10/01/2018] [Accepted: 10/04/2018] [Indexed: 12/29/2022] Open
Abstract
Epilepsy produces chronic chemical changes induced by altered cellular structures, and acute ones produced by conditions leading into individual seizures. Here, we aim to quantify 24 molecules simultaneously at baseline and during periods of lowered seizure threshold in rats. Using serial hippocampal microdialysis collections starting two weeks after the pilocarpine-induced status epilepticus, we evaluated how this chronic epilepsy model affects molecule levels and their interactions. Then, we quantified the changes occurring when the brain moves into a pro-seizure state using a novel model of physiological ictogenesis. Compared with controls, pilocarpine animals had significantly decreased baseline levels of adenosine, homovanillic acid, and serotonin, but significantly increased levels of choline, glutamate, phenylalanine, and tyrosine. Step-wise linear regression identified that choline, homovanillic acid, adenosine, and serotonin are the most important features to characterize the difference in the extracellular milieu between pilocarpine and control animals. When increasing the hippocampal seizure risk, the concentrations of normetanephrine, serine, aspartate, and 5-hydroxyindoleacetic acid were the most prominent; however, there were no specific, consistent changes prior to individual seizures.
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Affiliation(s)
- Hiram Luna-Munguia
- Departamento de Neurobiologia Conductual y Cognitiva, Instituto de Neurobiologia, Universidad Nacional Autonoma de Mexico, Campus UNAM-Juriquilla, Queretaro, Mexico
| | - Alexander G Zestos
- Department of Chemistry, Center for Behavioral Neuroscience, American University, Washington D.C. 20016, USA
| | - Stephen V Gliske
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109, USA; Department of Neurology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Robert T Kennedy
- Department of Chemistry, University of Michigan, Ann Arbor, MI 48109, USA; Department of Pharmacology, University of Michigan, Ann Arbor, MI 48109, USA
| | - William C Stacey
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109, USA; Department of Neurology, University of Michigan, Ann Arbor, MI 48109, USA.
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Wang T, Zhou X, Bai Y, Zhang L, Li L, Wu C. Antiepileptic effect of uridine may be caused by regulating dopamine release and receptor expression in corpus striatum. Brain Res 2018; 1688:47-53. [PMID: 29555238 DOI: 10.1016/j.brainres.2018.03.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Revised: 01/25/2018] [Accepted: 03/10/2018] [Indexed: 02/08/2023]
Abstract
Uridine is a potential endogenous neuromodulator studied for several decades for its antiepileptic effect, but the results were controversial. One remarkable feature of uridine is its regulatory action on the dopaminergic pathways. In this study, the changes in uridine and dopamine (DA) release were examined in the mouse corpus striatum after pilocarpine (PC) intraperitoneal injection. Then, the effect of uridine pre-treatment on DA release and expression of dopamine receptor (DR) was determined. The results revealed an increased uridine release initially, followed by a downward trend after an injection of 400-mg/kg PC. However, the DA release continuous increased significantly. The expression of dopamine receptor-1 (D1R) increased in a dose-dependent manner while that of dopamine receptor-2 (D2R) decreased significantly. Prophylactic administration of uridine significantly relieved the high-frequency and high-amplitude expression induced by PC as well as dose-dependently reversed the PC-induced changes in DA and DRs levels. These findings suggested that uridine produced an antiepileptic effect, which might have been mediated in part by interfering with the dopaminergic system.
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Affiliation(s)
- Tianlin Wang
- Department of Clinical Pharmacy, Chinese PLA General Hospital, Fuxing Road 28(#), 100853 Beijing, PR China; Key Laboratory of Neurodegenerative Diseases, Ministry of Education, Changchun Road 45(#), 100053 Beijing, PR China
| | - Xin Zhou
- Department of Clinical Pharmacy, Chinese PLA General Hospital, Fuxing Road 28(#), 100853 Beijing, PR China
| | - Yan Bai
- Department of Clinical Pharmacy, Chinese PLA General Hospital, Fuxing Road 28(#), 100853 Beijing, PR China
| | - Lan Zhang
- Key Laboratory of Neurodegenerative Diseases, Ministry of Education, Changchun Road 45(#), 100053 Beijing, PR China
| | - Lin Li
- Key Laboratory of Neurodegenerative Diseases, Ministry of Education, Changchun Road 45(#), 100053 Beijing, PR China
| | - Chunfu Wu
- Department of Pharmacology, Shenyang Pharmaceutical University, Box31, Wenhua Road 103#, 110016 Shenyang, PR China.
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21
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Alcantara JA, Vincentis S, Kerr DS, dos Santos B, Alessi R, van der Linden Jr H, Chaim T, Serpa MH, Busatto GF, Gattaz WF, Demarque R, Valente KD. Association study of functional polymorphisms of dopaminergic pathway in epilepsy-related factors of temporal lobe epilepsy in Brazilian population. Eur J Neurol 2018; 25:895-901. [DOI: 10.1111/ene.13631] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Accepted: 02/28/2018] [Indexed: 12/27/2022]
Affiliation(s)
- J. A. Alcantara
- Hospital das Clinicas HCFMUSP; Faculdade de Medicina; Universidade de Sao Paulo; Sao Paulo SP
- Faculdade de Medicina FMUSP; Universidade de Sao Paulo; Sao Paulo SP
| | - S. Vincentis
- Hospital das Clinicas HCFMUSP; Faculdade de Medicina; Universidade de Sao Paulo; Sao Paulo SP
- Faculdade de Medicina FMUSP; Universidade de Sao Paulo; Sao Paulo SP
| | - D. S. Kerr
- Faculdade de Medicina FMUSP; Universidade de Sao Paulo; Sao Paulo SP
| | - B. dos Santos
- Escola de Enfermagem EEUSP; Universidade de Sao Paulo; Sao Paulo SP
| | - R. Alessi
- Hospital das Clinicas HCFMUSP; Faculdade de Medicina; Universidade de Sao Paulo; Sao Paulo SP
| | | | - T. Chaim
- Faculdade de Medicina FMUSP; Universidade de Sao Paulo; Sao Paulo SP
| | - M. H. Serpa
- Faculdade de Medicina FMUSP; Universidade de Sao Paulo; Sao Paulo SP
| | - G. F. Busatto
- Hospital das Clinicas HCFMUSP; Faculdade de Medicina; Universidade de Sao Paulo; Sao Paulo SP
- Faculdade de Medicina FMUSP; Universidade de Sao Paulo; Sao Paulo SP
| | - W. F. Gattaz
- Hospital das Clinicas HCFMUSP; Faculdade de Medicina; Universidade de Sao Paulo; Sao Paulo SP
- Faculdade de Medicina FMUSP; Universidade de Sao Paulo; Sao Paulo SP
| | - R. Demarque
- Hospital das Clinicas HCFMUSP; Faculdade de Medicina; Universidade de Sao Paulo; Sao Paulo SP
| | - K. D. Valente
- Hospital das Clinicas HCFMUSP; Faculdade de Medicina; Universidade de Sao Paulo; Sao Paulo SP
- Faculdade de Medicina FMUSP; Universidade de Sao Paulo; Sao Paulo SP
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22
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Li X, Hou Y, Ren Y, Tian X, Song Y. Alterations of theta oscillation in executive control in temporal lobe epilepsy patients. Epilepsy Res 2018; 140:148-154. [DOI: 10.1016/j.eplepsyres.2017.12.017] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2017] [Revised: 12/06/2017] [Accepted: 12/30/2017] [Indexed: 10/18/2022]
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23
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Herold C, Bidmon HJ, Pannek HW, Hans V, Gorji A, Speckmann EJ, Zilles K. ATPase N-ethylmaleimide-sensitive Fusion Protein: A Novel Key Player for Causing Spontaneous Network Excitation in Human Temporal Lobe Epilepsy. Neuroscience 2018; 371:371-383. [DOI: 10.1016/j.neuroscience.2017.12.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Revised: 11/27/2017] [Accepted: 12/11/2017] [Indexed: 11/26/2022]
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24
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Pisklova MV, Litvinova SA, Voronina TA, Zhmurenko LA, Gaidukov IO, Narkevich VB, Kudrin VS. The Effects of the O-(2-R-oxime 4-benzoyl) pyridine derivate GIZh-298 and topiramate on the contents of monoamines and their metabolites in rat brain structures: A neurochemical study. NEUROCHEM J+ 2017. [DOI: 10.1134/s1819712417030102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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25
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Korshunov KS, Blakemore LJ, Trombley PQ. Dopamine: A Modulator of Circadian Rhythms in the Central Nervous System. Front Cell Neurosci 2017; 11:91. [PMID: 28420965 PMCID: PMC5376559 DOI: 10.3389/fncel.2017.00091] [Citation(s) in RCA: 91] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Accepted: 03/15/2017] [Indexed: 01/11/2023] Open
Abstract
Circadian rhythms are daily rhythms that regulate many biological processes – from gene transcription to behavior – and a disruption of these rhythms can lead to a myriad of health risks. Circadian rhythms are entrained by light, and their 24-h oscillation is maintained by a core molecular feedback loop composed of canonical circadian (“clock”) genes and proteins. Different modulators help to maintain the proper rhythmicity of these genes and proteins, and one emerging modulator is dopamine. Dopamine has been shown to have circadian-like activities in the retina, olfactory bulb, striatum, midbrain, and hypothalamus, where it regulates, and is regulated by, clock genes in some of these areas. Thus, it is likely that dopamine is essential to mechanisms that maintain proper rhythmicity of these five brain areas. This review discusses studies that showcase different dopaminergic mechanisms that may be involved with the regulation of these brain areas’ circadian rhythms. Mechanisms include how dopamine and dopamine receptor activity directly and indirectly influence clock genes and proteins, how dopamine’s interactions with gap junctions influence daily neuronal excitability, and how dopamine’s release and effects are gated by low- and high-pass filters. Because the dopamine neurons described in this review also release the inhibitory neurotransmitter GABA which influences clock protein expression in the retina, we discuss articles that explore how GABA may contribute to the actions of dopamine neurons on circadian rhythms. Finally, to understand how the loss of function of dopamine neurons could influence circadian rhythms, we review studies linking the neurodegenerative disease Parkinson’s Disease to disruptions of circadian rhythms in these five brain areas. The purpose of this review is to summarize growing evidence that dopamine is involved in regulating circadian rhythms, either directly or indirectly, in the brain areas discussed here. An appreciation of the growing evidence of dopamine’s influence on circadian rhythms may lead to new treatments including pharmacological agents directed at alleviating the various symptoms of circadian rhythm disruption.
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Affiliation(s)
- Kirill S Korshunov
- Program in Neuroscience, Florida State University,Tallahassee, FL, USA.,Department of Biological Science, Florida State University,Tallahassee, FL, USA
| | - Laura J Blakemore
- Program in Neuroscience, Florida State University,Tallahassee, FL, USA.,Department of Biological Science, Florida State University,Tallahassee, FL, USA
| | - Paul Q Trombley
- Program in Neuroscience, Florida State University,Tallahassee, FL, USA.,Department of Biological Science, Florida State University,Tallahassee, FL, USA
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26
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Abstract
Positron emission tomography (PET) is a neuroimaging method that offers insights into the molecular functioning of a human brain. It has been widely used to study metabolic and neurotransmitter abnormalities in people with epilepsy. This article reviews the development of several PET radioligands and their application in studying the molecular mechanisms of epilepsy. Over the last decade, tracers binding to serotonin and γ-aminobutyric acid (GABA) receptors have been used to delineate the location of the epileptic focus. PET studies have examined the role of opioids, cannabinoids, acetylcholine, and dopamine in modulating neuronal hyperexcitability and seizure termination. In vivo analyses of drug transporters, e.g., P-glycoprotein, have increased our understanding of pharmacoresistance that could inform new therapeutic strategies. Finally, PET experiments targeting neuroinflammation and glutamate receptors might guide the development of novel biomarkers of epileptogenesis.
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Affiliation(s)
- Marian Galovic
- Department of Clinical and Experimental Epilepsy, UCL Institute of Neurology, 33 Queen Square, London, WC1N 3BG, United Kingdom.,Epilepsy Society MRI Unit, Epilepsy Society, Chalfont St Peter, Buckinghamshire, United Kingdom
| | - Matthias Koepp
- Department of Clinical and Experimental Epilepsy, UCL Institute of Neurology, 33 Queen Square, London, WC1N 3BG, United Kingdom. .,Epilepsy Society MRI Unit, Epilepsy Society, Chalfont St Peter, Buckinghamshire, United Kingdom.
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27
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Svob Strac D, Pivac N, Smolders IJ, Fogel WA, De Deurwaerdere P, Di Giovanni G. Monoaminergic Mechanisms in Epilepsy May Offer Innovative Therapeutic Opportunity for Monoaminergic Multi-Target Drugs. Front Neurosci 2016; 10:492. [PMID: 27891070 PMCID: PMC5102907 DOI: 10.3389/fnins.2016.00492] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2016] [Accepted: 10/13/2016] [Indexed: 12/22/2022] Open
Abstract
A large body of experimental and clinical evidence has strongly suggested that monoamines play an important role in regulating epileptogenesis, seizure susceptibility, convulsions, and comorbid psychiatric disorders commonly seen in people with epilepsy (PWE). However, neither the relative significance of individual monoamines nor their interaction has yet been fully clarified due to the complexity of these neurotransmitter systems. In addition, epilepsy is diverse, with many different seizure types and epilepsy syndromes, and the role played by monoamines may vary from one condition to another. In this review, we will focus on the role of serotonin, dopamine, noradrenaline, histamine, and melatonin in epilepsy. Recent experimental, clinical, and genetic evidence will be reviewed in consideration of the mutual relationship of monoamines with the other putative neurotransmitters. The complexity of epileptic pathogenesis may explain why the currently available drugs, developed according to the classic drug discovery paradigm of "one-molecule-one-target," have turned out to be effective only in a percentage of PWE. Although, no antiepileptic drugs currently target specifically monoaminergic systems, multi-target directed ligands acting on different monoaminergic proteins, present on both neurons and glia cells, may represent a new approach in the management of seizures, and their generation as well as comorbid neuropsychiatric disorders.
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Affiliation(s)
| | - Nela Pivac
- Division of Molecular Medicine, Rudjer Boskovic InstituteZagreb, Croatia
| | - Ilse J. Smolders
- Department of Pharmaceutical Chemistry and Drug Analysis, Vrije Universiteit BrusselBrussels, Belgium
| | - Wieslawa A. Fogel
- Department of Hormone Biochemistry, Medical University of LodzLodz, Poland
| | | | - Giuseppe Di Giovanni
- Laboratory of Neurophysiology, Department of Physiology and Biochemistry, University of MaltaMsida, Malta
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28
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Tao K, Wang X. The comorbidity of epilepsy and depression: diagnosis and treatment. Expert Rev Neurother 2016; 16:1321-1333. [PMID: 27327645 DOI: 10.1080/14737175.2016.1204233] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Kaiyan Tao
- Chongqing Key Laboratory of Neurology, Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Xuefeng Wang
- Chongqing Key Laboratory of Neurology, Center of Epilepsy, Beijing Institute for Brain Disorders, Beijing, China
- Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
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29
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Weng WC, Huang HL, Wong LC, Jong YJ, Yin YJ, Chen HA, Lee WT, Ho SY. Increased risks of tic disorders in children with epilepsy: A nation-wide population-based case-control study in Taiwan. RESEARCH IN DEVELOPMENTAL DISABILITIES 2016; 51-52:173-180. [PMID: 26585639 DOI: 10.1016/j.ridd.2015.10.019] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Revised: 10/18/2015] [Accepted: 10/22/2015] [Indexed: 06/05/2023]
Abstract
Both epilepsy and tic disorders may share common mechanisms with the involvement of abnormal cortical-basal ganglion circuit connection and dopaminergic dysfunction. However, the association between epilepsy and tic disorders has never been studied. This study investigated the risks of developing tic disorders among children with epilepsy using databases of a universal health insurance system in Taiwan. The data analyzed in this study were retrieved from the National Health Insurance Research Database in Taiwan. The study cohort included children with epilepsy between 2001 and 2007 (n=2629) and a three-fold age- and gender-matched controls (n=7887). All subjects were followed up for 3 years from the date of cohort entry to identify their admissions due to tic disorders (ICD-9-CM codes 307.2, 307.20-307.23). Cox hazard regression analysis was performed to estimate the effect of epilepsy on the occurrence of tics. The epilepsy cohort had a higher prevalence of tics (1.7% vs. 0.2%), and a 8.70-fold increased risk of developing a tic disorder compared with the controls (adjusted hazard ratio (AHR) 8.70, 95% confidence interval (CI) 4.26-16.37, p<0.001). Male patients were observed to have a higher risk of developing a tic disorder (AHR 1.90, 95% CI=1.04-3.46, p<0.001) compared to female individuals. Patients with multiple antiepileptic drugs treatment also exhibited higher crude OR for developing tic disorders. This nationwide population-based cohort study, for the first time, demonstrated that there is a significantly increased risk for tic disorders among children with epilepsy. We also found males, attention deficit disorder and the use of multiple AEDs to be independent risk factors of tic disorders. Closely evaluating possible tic disorders would be crucial for improving the outcome and life quality in children with epilepsy.
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Affiliation(s)
- Wen-Chin Weng
- Department of Pediatrics, National Taiwan University Hospital, and College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Hui-Ling Huang
- Institute of Bioinformatics and Systems Biology, National Chiao Tung University, Hsinchu, Taiwan; Department of Biological Science and Technology, National Chiao Tung University, Hsinchu, Taiwan
| | - Lee Chin Wong
- Graduate Institute of Brain and Mind Sciences, National Taiwan University, Taipei, Taiwan
| | - Yuh-Jyh Jong
- Department of Biological Science and Technology, National Chiao Tung University, Hsinchu, Taiwan
| | - Yun-Ju Yin
- Institute of Bioinformatics and Systems Biology, National Chiao Tung University, Hsinchu, Taiwan
| | - Hong-An Chen
- Institute of Bioinformatics and Systems Biology, National Chiao Tung University, Hsinchu, Taiwan
| | - Wang-Tso Lee
- Department of Pediatrics, National Taiwan University Hospital, and College of Medicine, National Taiwan University, Taipei, Taiwan; Graduate Institute of Brain and Mind Sciences, National Taiwan University, Taipei, Taiwan.
| | - Shinn-Ying Ho
- Institute of Bioinformatics and Systems Biology, National Chiao Tung University, Hsinchu, Taiwan; Department of Biological Science and Technology, National Chiao Tung University, Hsinchu, Taiwan.
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30
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Bernedo Paredes VE, Buchholz HG, Gartenschläger M, Breimhorst M, Schreckenberger M, Werhahn KJ. Reduced D2/D3 Receptor Binding of Extrastriatal and Striatal Regions in Temporal Lobe Epilepsy. PLoS One 2015; 10:e0141098. [PMID: 26544593 PMCID: PMC4636381 DOI: 10.1371/journal.pone.0141098] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2015] [Accepted: 10/05/2015] [Indexed: 12/21/2022] Open
Abstract
Objective Dopamine is an endogenous neuromodulator in cortical circuits and the basal ganglia. In animal models of temporal lobe epilepsy (TLE), seizure threshold is modulated to some extent by dopamine, with D1-receptors having a pro- and D2-receptors an anticonvulsant effect. We aimed to extend our previously reported results on decreased D2/D3 receptor binding in the lateral epileptogenic temporal lobe and to correlate them with demographic and seizure variables to gain a more comprehensive understanding of the underlying involvement of the dopaminergic system in the epileptogenesis of TLE. Methods To quantify D2/D3 receptor binding, we studied 21 patients with TLE and hippocampal sclerosis (13 left- and eight right-sided) and 18 controls using PET with the high-affinity dopamine D2/D3-receptor ligand 18F-Fallypride to image striatal and extrastriatal binding. TLE was defined by interictal and ictal video-EEG, MRI and 18F-Fluorodeoxyglucose PET. Voxel-based statistical and regions-of-interest analyses were performed. Results 18F-Fallypride binding potential was significantly reduced in the affected temporal lobe and bilateral putamen. A positive correlation between age at onset of epilepsy and [18F]FP BPnd (binding potential non-displaceable) in temporal regions on the epileptogenic side was found, as well as a negative correlation between epilepsy duration and [18F]FP BPnd in the temporal pole on the epileptogenic side and a positive correlation between the estimated number of lifetime GTCS and [18F]FP BPnd in the hippocampus on the epileptogenic side. Significance The areas of reduced D2/D3 receptor availability correspond to “the irritative zone” surrounding the epileptogenic area. Moreover, reduced D2/D3 receptor availability was detectable in the basal ganglia, which are suspected to be involved in a control circuit for epileptic seizures. The correlational analysis additionally suggests that increased epilepsy duration leads to increasing impairment of the dopaminergic system.
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Affiliation(s)
- Viviane E. Bernedo Paredes
- Department of Neurology, University Medical Center of the Johannes Gutenberg University, Mainz, Germany
- * E-mail:
| | - Hans-Georg Buchholz
- Department of Nuclear Medicine, University Medical Center of the Johannes Gutenberg University, Mainz, Germany
| | - Martin Gartenschläger
- Department of Nuclear Medicine, University Medical Center of the Johannes Gutenberg University, Mainz, Germany
| | - Markus Breimhorst
- Department of Neurology, University Medical Center of the Johannes Gutenberg University, Mainz, Germany
| | - Mathias Schreckenberger
- Department of Nuclear Medicine, University Medical Center of the Johannes Gutenberg University, Mainz, Germany
| | - Konrad J. Werhahn
- Department of Neurology, University Medical Center of the Johannes Gutenberg University, Mainz, Germany
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31
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Zhvania MG, Ksovreli M, Japaridze NJ, Lordkipanidze TG. Ultrastructural changes to rat hippocampus in pentylenetetrazol- and kainic acid-induced status epilepticus: A study using electron microscopy. Micron 2015; 74:22-9. [PMID: 25978010 DOI: 10.1016/j.micron.2015.03.015] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Revised: 03/30/2015] [Accepted: 03/31/2015] [Indexed: 02/06/2023]
Abstract
A pentylenetetrazol (PTZ)-induced status epilepticus model in rats was used in the study. The brains were studied one month after treatment. Ultrastructural observations using electron microscopy performed on the neurons, glial cells, and synapses, in the hippocampal CA1 region of epileptic brains, demonstrated the following major changes over normal control brain tissue. (i) There is ultrastructural alterations in some neurons, glial cells and synapses in the hippocampal CA1 region. (ii) The destruction of cellular organelles and peripheral, partial or even total chromatolysis in some pyramidal cells and in interneurons are observed. Several astrocytes are proliferated or activated. Presynaptic terminals with granular vesicles and degenerated presynaptic profiles are rarely observed. (iii) The alterations observed are found to be dependent on the frequency of seizure activities following the PTZ treatment. It was observed that if seizure episodes are frequent and severe, the ultrastructure of hippocampal area is significantly changed. Interestingly, the ultrastructure of CA1 area is found to be only moderately altered if seizure episodes following the status epilepticus are rare and more superficial; (iv) alterations in mitochondria and dendrites are among the most common ultrastructural changes seen, suggesting cell stress and changes to cellular metabolism. These morphological changes, observed in brain neurons in status epilepticus, are a reflection of epileptic pathophysiology. Further studies at the chemical and molecular level of neurotransmitter release, such as at the level of porosomes (secretory portals) at the presynaptic membrane, will further reveal molecular details of these changes.
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Affiliation(s)
- Mzia G Zhvania
- Institute of Chemical Biology, Ilia State University, 3/5 K. Cholokhashvili Avenue, 0162 Tbilisi, Georgia; Department of Brain Ultrastructure and Nanoarchitecture, I. Beriitashvili Center of Experimental BioMedicine, 14, Gotua Street, 0160 Tbilisi, Georgia.
| | - Mariam Ksovreli
- Institute of Chemical Biology, Ilia State University, 3/5 K. Cholokhashvili Avenue, 0162 Tbilisi, Georgia.
| | - Nadezhda J Japaridze
- Department of Brain Ultrastructure and Nanoarchitecture, I. Beriitashvili Center of Experimental BioMedicine, 14, Gotua Street, 0160 Tbilisi, Georgia; New Vision University, 1A Evgeni Mikeladze Street, 0158 Tbilisi, Georgia.
| | - Tamar G Lordkipanidze
- Institute of Chemical Biology, Ilia State University, 3/5 K. Cholokhashvili Avenue, 0162 Tbilisi, Georgia; Department of Brain Ultrastructure and Nanoarchitecture, I. Beriitashvili Center of Experimental BioMedicine, 14, Gotua Street, 0160 Tbilisi, Georgia.
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32
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da Fonseca NC, Joaquim HP, Talib LL, de Vincentiis S, Gattaz WF, Valente KD. Hippocampal serotonin depletion is related to the presence of generalized tonic–clonic seizures, but not to psychiatric disorders in patients with temporal lobe epilepsy. Epilepsy Res 2015; 111:18-25. [DOI: 10.1016/j.eplepsyres.2014.12.013] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2014] [Revised: 12/18/2014] [Accepted: 12/30/2014] [Indexed: 11/16/2022]
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33
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Yang Y, Gao X, Xu Y. The dilemma of treatments for epileptic patients with depression. Int J Neurosci 2014; 125:566-77. [PMID: 25271800 DOI: 10.3109/00207454.2014.959122] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Depression is a state of low mood and aversion to activity. It may occur due to existence of other mental or physical diseases or from the medications for those illnesses. It is one of the leading sources of disability. Among these physical diseases, epilepsy is widely recognized as one of the main causes of depression. Patients with epilepsy are at high risk of developing depressive symptoms, and the suicide rates in patients with epilepsy have been reported to be much higher than in the general population. However, due to fears of lowering seizure threshold and adverse drug interactions between antidepressants and antiepileptic drugs, physician are reluctant to place patients with epilepsy on antidepressant medication. As a result, the question has been raised that what the best managements should be used to treat epileptic patients with depression. In this review, the currently used medications for antidepressants and antiepileptic drugs were summarized by their working targets in order to establish appropriate pharmacological management of depression and epilepsy. Despite the complex relationship between epilepsy and depression, coadministration of antidepressants and AEDs can still be done safely and effectively under the conditions of good clinical management. The ideal antidepressants for people with epilepsy should be efficacious but with few adverse effects, which will not antagonize GABAergic mechanisms or interfere with plasma anticonvulsant concentrations.
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Affiliation(s)
- Yang Yang
- 1Department of Clinical Psychology, Subei People Hospital of Jiangsu Province, Yangzhou, 225001, China
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34
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Rocha L, Alonso-Vanegas M, Orozco-Suárez S, Alcántara-González D, Cruzblanca H, Castro E. Do certain signal transduction mechanisms explain the comorbidity of epilepsy and mood disorders? Epilepsy Behav 2014; 38:25-31. [PMID: 24472685 DOI: 10.1016/j.yebeh.2014.01.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/16/2013] [Revised: 01/03/2014] [Accepted: 01/03/2014] [Indexed: 11/29/2022]
Abstract
It is well known that mood disorders are highly prevalent in patients with epilepsy. Although several studies have aimed to characterize alterations in different types of receptors associated with both disturbances, there is a lack of studies focused on identifying the causes of this comorbidity. Here, we described some changes at the biochemical level involving serotonin, dopamine, and γ-aminobutyric acid (GABA) receptors as well as signal transduction mechanisms that may explain the coexistence of both epilepsy and mood disorders. Finally, the identification of common pathophysiological mechanisms associated with receptor-receptor interaction (heterodimers) could allow designing new strategies for treatment of patients with epilepsy and comorbid mood disorders.
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Affiliation(s)
- Luisa Rocha
- Department of Pharmacobiology, Center of Research and Advanced Studies, Mexico City, Mexico.
| | - Mario Alonso-Vanegas
- National Institute of Neurology and Neurosurgery "Manuel Velasco Suarez", Mexico City, Mexico
| | - Sandra Orozco-Suárez
- Unit for Medical Research in Neurological Diseases, National Medical Center, Mexico City, Mexico
| | | | - Humberto Cruzblanca
- University Center of Biomedical Research, University of Colima, Colima, Mexico
| | - Elena Castro
- University Center of Biomedical Research, University of Colima, Colima, Mexico
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35
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Bulaj G. Combining non-pharmacological treatments with pharmacotherapies for neurological disorders: a unique interface of the brain, drug-device, and intellectual property. Front Neurol 2014; 5:126. [PMID: 25071711 PMCID: PMC4095562 DOI: 10.3389/fneur.2014.00126] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2014] [Accepted: 06/27/2014] [Indexed: 12/25/2022] Open
Abstract
Mobile medical applications (mHealth), music, and video games are being developed and tested for their ability to improve pharmacotherapy outcomes and medication adherence. Pleiotropic mechanism of music and gamification engages an intrinsic motivation and the brain reward system, supporting therapies in patients with neurological disorders, including neuropathic pain, depression, anxiety, or neurodegenerative disorders. Based on accumulating results from clinical trials, an innovative combination treatment of epilepsy seizures, comorbidities, and the medication non-adherence can be designed, consisting of antiepileptic drugs and disease self-management software delivering clinically beneficial music. Since creative elements and art expressed in games, music, and software are copyrighted, therefore clinical and regulatory challenges in developing copyrighted, drug–device therapies may be offset by a value proposition of the exclusivity due to the patent–independent protection, which can last for over 70 years. Taken together, development of copyrighted non-pharmacological treatments (e-therapies), and their combinations with pharmacotherapies, offer incentives to chronically ill patients and outcome-driven health care industries.
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Affiliation(s)
- Grzegorz Bulaj
- Department of Medicinal Chemistry, Skaggs Pharmacy Institute, College of Pharmacy, University of Utah , Salt Lake City, UT , USA
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Chbili C, B'chir F, Ben Fredj M, Saguem BN, Ben Amor S, Ben Ammou S, Saguem S. Effects of glutathione S-transferase M1 and T1 deletions on epilepsy risk among a Tunisian population. Epilepsy Res 2014; 108:1168-73. [PMID: 24970787 DOI: 10.1016/j.eplepsyres.2014.05.009] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2014] [Revised: 05/10/2014] [Accepted: 05/17/2014] [Indexed: 01/11/2023]
Abstract
Glutathione-S-transferases enzymes are involved in the detoxification of several endogenous and exogenous substances. In this present study, we evaluated the effects of two glutathione-S-transferase polymorphisms, (GSTM1 and GSTT1) on epilepsy risk susceptibility in a Tunisian population. These polymorphisms were analyzed in 229 healthy subjects and 98 patients with epilepsy, using a polymerase chain reaction (PCR). Odds ratio (ORs) was used for analyzing results. The study results demonstrated that individuals with the GSTM1 null genotype were at an increased risk of developing epilepsy [OR=3.80, 95% confidence interval (CI) (2.15-4.78)], whereas no significant effects were observed between individuals with GSTT1 null genotype and epilepsy risk [OR=1.15, 95% CI (0.62-2.12)]. These genotyping finding revealed that the absence of GSTM1 activity could be contributor factor for the development of epilepsy disease.
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Affiliation(s)
- Chahra Chbili
- Metabolic Biophysics, Professional Toxicology and Applied Environmental Laboratory, Department of Biophysics, Medicine Faculty of Sousse, Sousse University, Sousse 4002, Tunisia.
| | - Fatma B'chir
- Metabolic Biophysics, Professional Toxicology and Applied Environmental Laboratory, Department of Biophysics, Medicine Faculty of Sousse, Sousse University, Sousse 4002, Tunisia; Laboratory of Natural Substances, National Institute of Research and Physical-Chemical Analysis (INRAP), Technopole Sidi Thabet 2020, Tunisia
| | - Maha Ben Fredj
- Metabolic Biophysics, Professional Toxicology and Applied Environmental Laboratory, Department of Biophysics, Medicine Faculty of Sousse, Sousse University, Sousse 4002, Tunisia
| | - Bochra-Nourhène Saguem
- Metabolic Biophysics, Professional Toxicology and Applied Environmental Laboratory, Department of Biophysics, Medicine Faculty of Sousse, Sousse University, Sousse 4002, Tunisia
| | - Sana Ben Amor
- Neurology Department of Central Hospital University (CHU), Sousse University, Sousse 4002, Tunisia
| | - Sofiene Ben Ammou
- Neurology Department of Central Hospital University (CHU), Sousse University, Sousse 4002, Tunisia
| | - Saad Saguem
- Metabolic Biophysics, Professional Toxicology and Applied Environmental Laboratory, Department of Biophysics, Medicine Faculty of Sousse, Sousse University, Sousse 4002, Tunisia.
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The Effects of Mozart’s Music on Interictal Activity in Epileptic Patients: Systematic Review and Meta-analysis of the Literature. Curr Neurol Neurosci Rep 2013; 14:420. [DOI: 10.1007/s11910-013-0420-x] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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38
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Löscher W, Klitgaard H, Twyman RE, Schmidt D. New avenues for anti-epileptic drug discovery and development. Nat Rev Drug Discov 2013; 12:757-76. [DOI: 10.1038/nrd4126] [Citation(s) in RCA: 424] [Impact Index Per Article: 38.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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39
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Bozzi Y, Borrelli E. The role of dopamine signaling in epileptogenesis. Front Cell Neurosci 2013; 7:157. [PMID: 24062645 PMCID: PMC3774988 DOI: 10.3389/fncel.2013.00157] [Citation(s) in RCA: 107] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2013] [Accepted: 08/29/2013] [Indexed: 01/11/2023] Open
Abstract
Clinical and experimental studies implicate most neuromodulatory systems in epileptogenesis. The dopaminergic system has a seizure-modulating effect that crucially depends on the different subtypes of dopamine (DA) receptors involved and the brain regions in which they are activated. Specifically, DA plays a major role in the control of seizures arising in the limbic system. Studies performed in a wide variety of animal models contributed to illustrate the opposite actions of D1-like and D2-like receptor signaling in limbic epileptogenesis. Indeed, signaling from D1-like receptors is generally pro-epileptogenic, whereas D2-like receptor signaling exerts an anti-epileptogenic effect. However, this view might appear quite simplistic as the complex neuromodulatory action of DA in the control of epileptogenesis likely requires a physiological balance in the activation of circuits modulated by these two major DA receptor subtypes, which determines the response to seizure-promoting stimuli. Here we will review recent evidences on the identification of molecules activated by DA transduction pathways in the generation and spread of seizures in the limbic system. We will discuss the intracellular signaling pathways triggered by activation of different DA receptors in relation to their role in limbic epileptogenesis, which lead to the activation of neuronal death/survival cascades. A deep understanding of the signaling pathways involved in epileptogenesis is crucial for the identification of novel targets for the treatment of epilepsy.
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Affiliation(s)
- Yuri Bozzi
- Laboratory of Molecular Neuropathology, Centre for Integrative Biology, University of Trento Trento, Italy ; Neuroscience Institute, National Research Council Pisa, Italy
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Van Liefferinge J, Massie A, Portelli J, Di Giovanni G, Smolders I. Are vesicular neurotransmitter transporters potential treatment targets for temporal lobe epilepsy? Front Cell Neurosci 2013; 7:139. [PMID: 24009559 PMCID: PMC3757300 DOI: 10.3389/fncel.2013.00139] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2013] [Accepted: 08/11/2013] [Indexed: 12/18/2022] Open
Abstract
The vesicular neurotransmitter transporters (VNTs) are small proteins responsible for packing synaptic vesicles with neurotransmitters thereby determining the amount of neurotransmitter released per vesicle through fusion in both neurons and glial cells. Each transporter subtype was classically seen as a specific neuronal marker of the respective nerve cells containing that particular neurotransmitter or structurally related neurotransmitters. More recently, however, it has become apparent that common neurotransmitters can also act as co-transmitters, adding complexity to neurotransmitter release and suggesting intriguing roles for VNTs therein. We will first describe the current knowledge on vesicular glutamate transporters (VGLUT1/2/3), the vesicular excitatory amino acid transporter (VEAT), the vesicular nucleotide transporter (VNUT), vesicular monoamine transporters (VMAT1/2), the vesicular acetylcholine transporter (VAChT) and the vesicular γ-aminobutyric acid (GABA) transporter (VGAT) in the brain. We will focus on evidence regarding transgenic mice with disruptions in VNTs in different models of seizures and epilepsy. We will also describe the known alterations and reorganizations in the expression levels of these VNTs in rodent models for temporal lobe epilepsy (TLE) and in human tissue resected for epilepsy surgery. Finally, we will discuss perspectives on opportunities and challenges for VNTs as targets for possible future epilepsy therapies.
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Jiang G, Cao Q, Li J, Zhang Y, Liu X, Wang Z, Guo F, Chen Y, Chen Y, Chen G, Wang X. Altered expression of vesicular monoamine transporter 2 in epileptic patients and experimental rats. Synapse 2013; 67:415-26. [PMID: 23504951 DOI: 10.1002/syn.21663] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2012] [Accepted: 03/11/2013] [Indexed: 12/17/2022]
Abstract
In the central nervous system (CNS), vesicular monoamine transporter 2 (VMAT2) transports cytoplasmic monoamines such as dopamine into synaptic vesicles for storage and subsequent exocytotic release. Recent studies have provided direct evidence for VMAT2-regulated monoamine neurotransmitter involvement in the neurophysiological activities of neurological disease. This study investigated the expression pattern of VMAT2 in patients with temporal lobe epilepsy (TLE) and in a rat model of epilepsy. We assessed the expression of VMAT2 in the temporal neocortex in 24 TLE patients using western blotting and quantitative real time PCR (qRT-PCR) analyses. These results showed that VMAT2 expression dynamically decreased in TLE patients when compared with the control subjects (n = 12). And that VMAT2 protein transiently increased in acute stages (1 day and 3 days) after epileptic seizures in pilocarpine-treated rats; however, it clearly decreased after spontaneous recurrent seizures (7 days, 21 days, and 60 days after seizures). In addition, double immunofluorescence and immunohistochemical labeling studies performed in patient and experimental animal tissue revealed that VMAT2 protein was mainly expressed in the cytoplasm and in the axons of neurons but not glial cells in the hippocampus and temporal lobe cortex. These data suggested that the abnormal expression of VMAT2 mRNA and protein in epileptic brain tissue may contribute to vulnerability toward epilepsy-related psychiatric disorders and cognitive impairment.
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Affiliation(s)
- Guohui Jiang
- Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Neurology, Chongqing, 400016, China
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Jones NC, O'Brien TJ. Stress, epilepsy, and psychiatric comorbidity: how can animal models inform the clinic? Epilepsy Behav 2013; 26:363-9. [PMID: 23099287 DOI: 10.1016/j.yebeh.2012.09.002] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2012] [Accepted: 09/06/2012] [Indexed: 12/15/2022]
Abstract
Psychiatric complaints afflict many patients with epilepsy, and these contribute significantly to the impaired quality of life experienced by sufferers of this common group of neurological conditions. Psychiatric disorders in epilepsy patients are under-diagnosed and under-treated. Moreover, evidence suggests that the psychiatric disorders may act as risk factors for some types of epilepsy and exacerbate disease progression in established cases, promoting the case for a bidirectional relationship between epilepsy and psychopathology. While cause and effect relationships can be difficult to establish in human studies, appropriate animal models provide valuable tools with which to study the interactions between epilepsy and stress-related disorders. Indeed, many epilepsy models exhibit behavioral phenotypes which are reflective of psychiatric disorders, and, conversely, stressful environments appear to promote a vulnerability to developing epilepsy. This review summarizes this research area, exploring the behavioral phenotypes in animal models of epilepsy and then examining the influence of stressful environments on susceptibility to seizures and epilepsy. The ultimate goal of this line of research is to be able to translate these findings to humans. Understanding the relationships between epilepsy and associated psychiatric disorders will facilitate effective treatment of mood disorders in epilepsy, inform about the pathophysiology of each individually, and potentially open up novel therapeutic disease-modifying strategies for patients with epilepsy.
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Affiliation(s)
- Nigel C Jones
- Department of Medicine (Royal Melbourne Hospital), Melbourne Brain Centre, University of Melbourne, Parkville, VIC, Australia.
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Sexual response in female rats with status epilepticus. Epilepsia 2013; 54:644-8. [DOI: 10.1111/epi.12117] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/02/2013] [Indexed: 11/26/2022]
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Alcantara-Gonzalez D, Floran B, Escartin E, Rocha L. Changes on D2-like receptor induced Gi protein activation and hippocampal dopamine release in kindled rats. Prog Neuropsychopharmacol Biol Psychiatry 2013; 40:246-51. [PMID: 23085386 DOI: 10.1016/j.pnpbp.2012.10.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/03/2012] [Revised: 10/10/2012] [Accepted: 10/12/2012] [Indexed: 01/15/2023]
Abstract
The present study aimed to characterize dopamine release in the hippocampus and D2-like receptor-induced Gi protein activation in several brain areas of fully kindled rats. During the interictal period, kindled rats showed lower extracellular levels of dopamine when compared with those obtained in the control group under basal conditions, a situation that was not modified when an afterdischarge was evoked. Hippocampal perfusion of sulpiride, a D2 receptor antagonist, enhanced dopamine release, which was more evident when an afterdischarge was induced in kindled rats. In addition, sulpiride perfusion was associated with longer seizure duration. Functional autoradiography experiments revealed increased [(35)S]GTPγS incorporation as a consequence of D2-like receptor activation in different brain areas of fully kindled animals, including the ventral hippocampus. The present study reveals that hippocampal kindling is associated with alterations in dopamine release and D2-like receptor-induced neurotransmission.
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